Nut-lock.



To all wLom t may concern:

'y UNITED sTATEs PATENT oFFioE.

MASON C.l MOCOY, OF WAITSBURG, WASHINGTON.

NUT-LOCK.

Specification of Letters Patent Patented Feb. 22,1916.

Application led November 10, 1914. Serial No. 871,332;

Be it known that i, MASON c. Meow, e citizen of the United States,residing at Waitsburg, in the Vcounty of Walla Walla and State ofWashington, have. invented certain new and useful Improvementsin Nut-Locks, of which the following is a speciiication, 'reference beinghad therein to the accompanying drawing.

This invention relates to a nut look, and has for its principal objectthe production of an efficient and simple means whereby the nut will beheld in a set position upon the bolt'after the saine has been threadedthereon and locked.

Another object of this invention is the production of a nut lock inwhich the nut comprises'a plurality of sections which are.

held against independent rotation by means of novel and eiiicientCotter-pins, carried by registering grooves', which are so formed as Yto holdv against rotationwithin these coves. y With these andotherobjects in View, this invention consists of certain novelconstructions, combinations and arrangements of parts as will behereinafterfully described and claimed. z

In the drawin :-'Figure 1 is a side. elevation of the nutock,f,particularly shown in cross section, illustrating the manner inwhich the nut is locked in position. Fig. 2 is a sectionl taken on line2-2, Fig. 1. Fig. -3 is a fragmentary detail perspectiveview of one ofthe sections of the nut. Fig. 4 is a detail perspective view of theCotter-pin.

Referring to the accompanying drawing by numerals, 1 designates the boltwhich is carried by the supports 2, and which is provided with a head 3bearing upon the support. Adjacent the outer end of the bolt is providedright-hand threads 4 and adjacent these ri ht-hand threads 4 is formed areduced sha 5 having left-hand threads 6. The primary section 7 of thenut is threaded upon the right-hand threads '4, while the auxiliarysection 8 is carried by the shank 5. It is vof course obvious that thethreaded bore 9 of the primary section 7 is large enough to pass overthe shank .5l so as to engage the threaded portion'4. These sections 7and 8 are provided with parallel grooves 10, as clearly shown in Fig. 3,and these grooves are so'formed as to come in registry with each otherfor allowing a suitable Cotter-pin to be passed therethrough for holdingthe nut against rotation after the same is screwed upon the bolt.

It will be seen that the sections 7 and 8 are locked in position bymoans of thecotter-pin 11. The fingers 12 of this cotterpin are tapered,as shown at 15, to form the shoulders'l upon the thickened ends 14. Thepin may be compressed,as shown in Fig. 4, at which time it may be forcedthrough two of the grooves 10 and after the end-portions 14 thereof havepassed through the grooves they will spring outwardly, as shownin Fig.2, so as, to allow the shoulv ders 16 to engage the outer surfaces ofthe sections 7 and .8 of the nut for preventing the cotter-pinfrom beingaccidentally withdrawn from the grooves.

It will be seen that the -shoulders 16 are beveled inwardly toward thebody portions of the ends 14 so that the portions of the shoulders whichengage the nut will present biting edges which will bear upon the nutwith a bitingor digging action for holding the shoulders fromaccidentally slipping from engagement with the nut. Therefore, the

Ylingers will normally .remain in a spread been produced in which thesections of the nut are lirst threaded upon the bolt, these sectionsbeing so formedv as to carry cotterpins in such manner as to prevent theindependent rotation of the sections while the Cotter-pins will beprevented from rotating within the grooves. In this'manner thecotter-pins will be prevented from accidentally falling out or otherwisebecoming removed from engagement with the sections.

What I claim is: l

In a nut lock of the class described, the i combination of a bolt havingright and left threads, a nut comprising a pair of sections carried bysaid threads, said sections provided with parallel registering grooveshaving straight side faces, cotter-pins carried head, whereby saidbiting edges will hold said fingers from accidentally swinging to aclosed position whereby said shoulders will hold said pin againstaccidental displace- 15 ment.

In testimony whereof I hereunto ax my signature in presence of twowitnesses.

MASON C. MCCOY. VVitnesse's:

J. E. BUTLER, W. WALLACE.

